Hey, you want Shuyin/Yuna? There's this really long fic by akksgurl called Silverwings on Fanfiction.net and its in three parts. The first part is Shuyin/Lenne from when they met to their death, the second is all this craziness with Tidus being posssed by Shuyin and the 3rd one is even harder to explain but its got an FF8 crossover. Anyway, the most recent chapter of Silverwings 3 has some Shuyin/Yuna in and it takes so long to build up to it that's it really good and really realistic. Thoguht you might be interested. Believe me I am very picky about what I call good fanfiction and I can say without any reserve that Silverwings is the best FFX-2 fanfiction in the entire fandom.